First initialise Exupery to prepare the code cache. This will
also clear out any currently compiled code.
Then start the background compiler using the following expression.
Then when done use the following to stop it.
Thanks to Andy Tweek and Mathieu Suen for building the
Windows and Mac VMs.
The Mac VM was built with gcc optimisation switched off to
avoid a bug in gcc 4.0 so it's probably much slower than the
This is still an alpha release, running the background compiler will
lead to crashes, but it should run for long enough to play with. The
next release will improve both the profiler that drives background
compilation and reliability.